<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>双飞翼布局</title>
    <style>
        body {
            min-width: 550px;
        }
        
        .col {
            float: left;
        }
        
        #main {
            width: 100%;
            height: 200px;
        }
        
        #main-wrap {
            margin: 0 150px 0 200px;
            height: 200px;
            background-color: purple;
        }
        
        #left {
            width: 200px;
            height: 200px;
            background-color: hotpink;
            margin-left: -100%;
        }
        
        #right {
            width: 150px;
            height: 200px;
            margin-left: -150px;
            background-color: skyblue;
        }
    </style>
</head>

<body>
    <div id="main" class="col">
        <div id="main-wrap">
            this is main
        </div>
    </div>
    <div id="left" class="col">
        this is left
    </div>
    <div id="right" class="col">
        this is right
    </div>
</body>

</html>